Index: program/include/rcube_contacts.php
===================================================================
--- program/include/rcube_contacts.php	(revision 631967024347b32fc1791a0d91d0d4d93f9c381a)
+++ program/include/rcube_contacts.php	(revision 495c0e512ceb8906dd72b2887ecd11f3e1282b7c)
@@ -28,6 +28,8 @@
 class rcube_contacts extends rcube_addressbook
 {
+    // protected for backward compat. with some plugins
+    // maybe changed in the future
+    protected $db_name = '';
     private $db = null;
-    private $db_name = '';
     private $user_id = 0;
     private $filter = null;